A
which animal is an example of a benthos?
Barnacle
diatom
algae
fish larvae
barnacle
bacteria is a necessary part of the ____ cycle
Nitrogen
A _____ is in danger of becoming extinct
endangered species
the _______ involves the constant reuse of water
water cycle
which biome has no trees and is frozen year round?
Tundra
Fish and other active swimmers in a body of water are part of the category called?
Nekton
The worlds largest biome is the?
Taiga
The boundary where a river feeds into the ocean is a (an)
estuary
A _____ includes many ecosystems grouped together as one.
Biome
Which biome covers most of the US?
forest
The formation of a new community where another community already exists is known as?
Secondary succession
The final stage of succession is a (an)
climax community
A mixture of dead organic material that can be used as a fertilizer is called a
compost
During _____, an are3a is changed by a species which is then re3placed by other species over time?
succession
trees such as oakes and maples grow in a?
deciduous forest
Which ocean zone is the shallowest
intertidal
As part of the ____ _____ plants take in carbon dioxide from the air.
carbon cycle
which ecosystem has both fresh water and salt water?
estuary
Maples, beeches, and other hardwood trees is in which community?
Climax
In a water ecosystem, why are many producers found near the surface?
They require sunlight
which type of succession would occur after a fire has burned a forest?
secondary succession
In which natural cycle must an important gas in Earth's atmosphere be fixed before plants can use it?
Nitrogen Cycle
A pioneer species that often makes up a pioneer community is a
moss
In which ocean zone are coral reefs and kelp forests located
neritic zone
Most pond organisms live in shallow water because?
there is more oxygen